There are several email marketing services that are well-suited for small businesses. Some popular options include:

1. Mailchimp: Mailchimp is a popular and user-friendly email marketing service that offers a wide range of features, including email design templates, automation, and analytics. It also offers a free plan for users with a small number of subscribers.
2. Constant Contact: Constant Contact is another popular email marketing service that offers a user-friendly interface and a wide range of features, including templates, automation, and reporting. It also offers a free trial and a 60-day money-back guarantee.
3. GetResponse: GetResponse is a comprehensive email marketing service that offers automation, list segmentation, and a wide range of design options. It also includes a landing page creator and webinar platform which can be useful for small businesses.
4. Aweber: Aweber is a feature-rich email marketing service that offers automation, list segmentation, and over 700 email templates. it also offers a free trial and a 30-day money-back guarantee.
5. Campaign Monitor: Campaign Monitor is another feature-rich email marketing service that offers automation, list segmentation, and a wide range of design options. It also includes a landing page builder and A/B testing capabilities.

It’s worth considering what is important to you and your business and comparing the different features and pricing of these providers to determine which one is the best fit for your needs.